Accuracy: ?2″.
To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
Can be combined to any angle with interval 6 seconds after combination (6″, 12″, 18″, … , 360?).

3M 50730, PPS UV Standard Lid & Liner Kit, Standard (22 fl oz, 650
mL), 125 Micron Filters, 7100067511
Insize 6300, MICROMETER STAND, 6928640307294
Dynabrade 78585 1/4" Dia. x 1-1/2" W x 1/8" Center Hole, 120 Grit, 100/pack
3M 14350, Trizact Cloth Belt 217EA, A16 JE-weight, 4 in x 118 in, Film-lok, Full-flex, 7010307902, 50 per case
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
3M 50010, VentureClad Insulation Jacketing Tape 1577CW-WME, White, 99 mm x 13.7 m, 7010379907
3M 33446, Cubitron II File Belt, 80+, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100033186, 10 belts per carton, 5 cartons per case
3M 08201, OEM Seam Sealer Tip, 1/4 in, Rounded, 6 per bag, 7000118467
Dynabrade 90211 1/8" W x 18" L 60 Grit A/O DynaCut Belt, 50/pack
3M 63738, Contractor Grade Multi-Use Duct Tape 2979, Silver, 1.88 in x 60 yd, 7010335692
Dynabrade 79325 4-1/2" Dia. x 7/8" Center Hole, 36 Grit, Ceramic DynaCut Fiber Disc, 25/box
3M 07054, General Purpose Sanding Sponge CP041-12-CC, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101246 